seraph
noun /ˈserəf/
  /ˈserəf/
(plural seraphim 
 /ˈserəfɪm/
  /ˈserəfɪm/
, seraphs)- an angel of the highest rank compare cherubWord OriginOld English, back-formation from seraphim (plural), via late Latin and Greek from Hebrew śěrāp̲īm. Compare with cherub.